Really neat little game - I loved the theme and the art (I like trains)! I really had a lot of fun playing it. One thing I couldn't figure out is what the exit is for:
I went past it twice and couldn't figure out what to do with it. On one of my earlier runs I saw a green upwards arrow and collected it... but no clue what that did either. Maybe I didn't play it long enough?
Additionally, I want to thank you personally for distributing a Linux build of your application! It made downloading and running the game a breeze. Thank you!❤️